CN112359711A - Steel-concrete combined bent cap - Google Patents
Steel-concrete combined bent cap Download PDFInfo
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- CN112359711A CN112359711A CN202011140137.9A CN202011140137A CN112359711A CN 112359711 A CN112359711 A CN 112359711A CN 202011140137 A CN202011140137 A CN 202011140137A CN 112359711 A CN112359711 A CN 112359711A
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- steel
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- bottom plate
- plate
- pier stud
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/02—Piers; Abutments ; Protecting same against drifting ice
Abstract
The invention discloses a steel-concrete combined capping beam which comprises a steel-concrete combined capping beam shell arranged on a reinforced concrete pier stud. The lower end face of the steel-concrete combined cover beam shell is provided with an opening and a round hole, the upper end face of the reinforced concrete pier stud is provided with a reserved groove, the steel-concrete combined cover beam shell is installed at the upper end of the reinforced concrete pier stud, the opening is aligned with the reserved groove, the upper ends of a plurality of longitudinal stress main reinforcements of the reinforced concrete pier stud penetrate through the round hole and the opening and extend into the steel-concrete combined cover beam shell, and concrete is filled in the reserved groove and the steel-concrete combined cover beam shell. The invention fully utilizes the advantages of high tensile strength of steel, good compression resistance of concrete and low manufacturing cost, realizes light construction and rapid construction of the bent cap, and improves the stress performance of the bent cap during operation.
Description
Technical Field
The invention relates to the field of bridge structures, in particular to a steel-concrete combined capping beam.
Background
The infrastructure construction scale of China is huge, about 50% of cement is consumed in the world every year, and the greening upgrading transformation of the construction industry is the major strategic development direction of China at present. The steel-concrete combined technology improves the service performance and the service life of the structure on the premise of not obviously increasing the investment of the infrastructure, meets the construction requirements of energy conservation, environmental protection, rapidness, safety, high efficiency and beauty, and is an important technology for green upgrading transformation in the construction industry of China.
At present, the fabricated bridge is widely popularized in China, the urban viaduct is used for reducing urban land, a large cantilever capping beam is usually adopted, the dead weight of a common reinforced concrete large cantilever capping beam can reach 200-400 tons, the dead weight is too large, great difficulty exists in transportation and installation, the difficult problem of assembling of the large capping beam is not solved all the time, but the traffic needs to be interrupted or serious influence is caused to the traffic by continuously adopting a cast-in-place concrete technology, and safety problems can also be caused, so that the rapid construction of the urban bridge capping beam is very important. In addition, the reinforced concrete bent cap is easy to crack due to low tensile strength of concrete, so that the durability of the bent cap is reduced, and the service life of the bridge is influenced; the traditional concrete cover beam generally adopts a solid structure, and the dead weight effect in the construction process is small; after the superstructure is erected in place, the capping beam needs to bear the deadweight, the second-stage dead load and the live load of the superstructure, the action effect of the capping beam is far greater than the deadweight effect of the capping beam, the stress characteristics lead the capping beam to be capable of applying little prestress to avoid the cracking of the lower edge of the capping beam in the self construction stage, and the prestress needs to be gradually applied to resist the dead load and the live load transferred by the superstructure along with the erection of the superstructure, so that the construction process is complex and the construction efficiency is low.
Therefore, it is necessary to develop a new capping beam structure to solve the above problems.
Disclosure of Invention
The invention aims to provide a steel-concrete combined capping beam which can realize light construction and rapid construction of the capping beam and improve the stress performance of the capping beam during operation.
The technical scheme adopted for achieving the aim of the invention is that the steel-concrete combined cover beam comprises a steel-concrete combined cover beam shell which is arranged on a reinforced concrete pier column.
The steel-concrete combined bent cap shell is formed by welding steel plates, and the lower end face of the steel-concrete combined bent cap shell is provided with an opening and a plurality of round holes penetrating through the inner side and the outer side of the steel-concrete combined bent cap shell.
The upper end face of the reinforced concrete pier stud is provided with a reserved groove, and the size of the reserved groove is matched with that of the opening.
A plurality of longitudinal stress main ribs are arranged in the reinforced concrete pier stud, and the upper ends of the longitudinal stress main ribs extend out of the upper end face of the reinforced concrete pier stud and the upper end opening of the reserved groove.
The steel-concrete combined capping beam shell is installed at the upper end of the reinforced concrete pier stud, the opening is aligned with the reserved groove, the upper ends of the longitudinal stress main ribs penetrate through the round hole and the opening and extend into the steel-concrete combined capping beam shell, and concrete is filled in the reserved groove and the steel-concrete combined capping beam shell.
Further, the steel-concrete combined bent cap shell comprises a steel web plate, a steel top plate, a steel end plate, a steel inclined bottom plate and a steel flat bottom plate which are rectangular plates.
The steel top plate and the steel flat bottom plate are arranged horizontally, the steel top plate is located right above the steel flat bottom plate, and the steel flat bottom plate is provided with a plurality of round holes and a plurality of open holes penetrating through the upper plate surface and the lower plate surface of the steel flat bottom plate.
The two ends of the steel flat bottom plate are respectively welded with the two steel inclined bottom plates, the upper end of each steel inclined bottom plate is welded with a vertical steel end plate, the upper ends of the two steel end plates are respectively welded to the two ends of the steel top plate to form a frame with an inner hollow part and two openings at two sides, and the two vertical steel web plates are respectively sealed and welded to the openings at two sides of the frame.
Further, the lower surface welding of steel roof has vertical trompil steel sheet, is provided with a plurality of interlude holes that supply the perforation reinforcing bar to pass on the trompil steel sheet, and a plurality of perforation reinforcing bars pass the interlude hole.
Furthermore, a plurality of uniformly arranged welding nail connecting pieces are welded on the inner walls of the steel inclined bottom plate, the steel flat bottom plate and the steel web plate.
Furthermore, epoxy mortar is coated on the contact surface of the upper end surface of the reinforced concrete pier stud and the steel flat bottom plate for sealing.
Furthermore, a pouring opening for pouring concrete is formed in the steel top plate, and the concrete is filled into the preformed groove and the steel-concrete combined cover beam shell through the pouring opening. The concrete is micro-expansive concrete.
Further, a circular steel plate is welded at the top of the longitudinal stress main rib.
The invention has the beneficial effects that:
1. the yield strength of the steel top plate and the steel web plate in the capping beam is high, the problems that the upper edge of the concrete capping beam is pulled and the web plate is sheared and easily cracked can be solved, and the normal use performance, the ultimate bearing capacity and the durability of the structure are greatly improved;
2. the steel cover beam shell can be processed in a factory, and the processing quality is high; the steel bent cap shell is light in weight and convenient to transport and hoist; the steel bent cap shell is used as a permanent template in the construction process, so that the time for installing and removing the template is saved;
3. the lower edge of the steel top plate is provided with the perforated steel plate which can enhance the local rigidity of the steel top plate, common steel bars penetrate through the perforated steel plate, and the PBL connecting piece is formed after concrete is poured to ensure that the steel top plate and the concrete can work cooperatively; welding nails are welded on the inner sides of the steel inclined bottom plate, the steel flat bottom plate and the steel web plate, so that the steel inclined bottom plate, the steel flat bottom plate, the steel web plate and the concrete can work cooperatively;
4. the longitudinal stress main rib of the pier column extends into the steel cover beam shell for a certain length, so that the steel-concrete combined cover beam and the reinforced concrete pier column can be fixed, the concrete filled in the steel cover beam shell extends downwards into the pier column reserved groove, the shearing rigidity and the strength of the pier top section can be increased, and the seismic performance of the connecting node is improved.
Drawings
FIG. 1 is a schematic view of a steel-concrete composite capping beam;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
FIG. 3 is a schematic view of a reinforced concrete pier stud;
FIG. 4 is a schematic view of a steel flat bottom plate.
In the figure: the steel top plate comprises a steel top plate 1, a steel end plate 2, a steel inclined bottom plate 3, a steel flat bottom plate 4, a reinforced concrete pier stud 5, concrete 6, a perforated steel plate 7, a welding nail connecting piece 8, a longitudinal stress main rib 9, a preformed groove 10, a steel web plate 11, a round hole 12 and a perforation 13.
Detailed Description
The present invention is further illustrated by the following examples, but it should not be construed that the scope of the above-described subject matter is limited to the following examples. Various substitutions and alterations can be made without departing from the technical idea of the invention and the scope of the invention is covered by the present invention according to the common technical knowledge and the conventional means in the field.
Example 1:
the embodiment discloses a steel-concrete combined capping beam which comprises a steel-concrete combined capping beam shell arranged on a reinforced concrete pier stud 5.
Referring to fig. 1, the steel-concrete combined bent cap shell is formed by welding steel plates and comprises a steel web plate 11, a steel top plate 1, a steel end plate 2, a steel inclined bottom plate 3 and a steel flat bottom plate 4 which are rectangular plates.
The equal level setting of steel roof 1 and steel flat bottom 4, directly over steel roof 1 is located steel flat bottom 4, and the lower skin weld of steel roof 1 has vertical trompil steel sheet 7, is provided with a plurality of interlude holes that supply the perforation reinforcing bar to pass on the trompil steel sheet 7, and a plurality of perforation reinforcing bars pass the interlude hole. And a pouring opening for pouring concrete 6 is formed in the steel top plate 1.
Referring to fig. 4, the steel flat bottom plate 4 is provided with an opening 13 and a plurality of circular holes 12 penetrating through the upper and lower plate surfaces thereof.
The both ends of steel flat bottom plate 4 weld with two oblique bottom plates of steel 3 respectively, and the upper end welding of every oblique bottom plate of steel 3 has vertical steel end plate 2, and the both ends that weld steel roof 1 respectively of the upper end of two steel end plates 2 form inside cavity and both sides open-ended frame, and two vertical steel web 11 are the closing cap respectively and weld on the both sides opening of this frame. Referring to fig. 1 or 2, a plurality of uniformly arranged welding nail connecting pieces 8 are welded on the inner walls of the steel inclined bottom plate 3, the steel flat bottom plate 4 and the steel web plate 11.
Referring to fig. 3, the upper end surface of the reinforced concrete pier stud 5 is provided with a preformed groove 10, and the size of the preformed groove 10 is matched with that of the open hole 13.
A plurality of longitudinal stress main ribs 9 are arranged in the reinforced concrete pier stud 5, circular steel plates are welded at the tops of the longitudinal stress main ribs 9, and the upper ends of the longitudinal stress main ribs 9 extend out of the upper end face of the reinforced concrete pier stud 5 and the upper end opening of the preformed groove 10.
And during construction, transporting the steel-concrete combined bent cap shell processed in a factory to a construction site. Coating a layer of epoxy mortar with the thickness of about 1cm on the upper end face of the reinforced concrete pier stud 5 to play a role in sealing a subsequent contact surface, hoisting the steel-concrete combined bent cap shell above the reinforced concrete pier stud 5, enabling the upper ends of a plurality of longitudinal stress main ribs 9 to penetrate through the open holes 13 and the round holes 12 in the steel flat bottom plate 4, enabling the lower surface of the steel flat bottom plate 4 to be in close contact with the upper end face of the reinforced concrete pier stud 5, and enabling the open holes 13 to be aligned with the reserved grooves 10. And filling concrete 6 into the preformed groove 10 and the steel-concrete combined capping beam shell through a pouring opening in the steel top plate 1 until the concrete is compact, wherein the concrete 6 is micro-expansive concrete.
Example 2:
the embodiment discloses a steel-concrete combined capping beam which comprises a steel-concrete combined capping beam shell arranged on a reinforced concrete pier stud 5.
The steel-concrete combined bent cap shell is formed by welding steel plates, and the lower end face of the steel-concrete combined bent cap shell is provided with an opening 13 and a plurality of round holes 12 penetrating through the inner side and the outer side of the steel-concrete combined bent cap shell.
Referring to fig. 3, the upper end surface of the reinforced concrete pier stud 5 is provided with a preformed groove 10, and the size of the preformed groove 10 is matched with that of the open hole 13.
A plurality of longitudinal stress main ribs 9 are arranged in the reinforced concrete pier stud 5, and the upper ends of the longitudinal stress main ribs 9 extend out of the upper end surface of the reinforced concrete pier stud 5 and the upper end opening of the preformed groove 10.
Referring to fig. 1, the steel-concrete composite bent cap housing with the reinforcement cage inside is installed at the upper end of the reinforced concrete pier stud 5, the opening 13 is aligned with the reserved groove 10, the upper ends of the longitudinal stress main reinforcements 9 penetrate through the round hole 12 and the opening 13 and extend into the steel-concrete composite bent cap housing, and the reserved groove 10 and the steel-concrete composite bent cap housing are filled with concrete 6.
Example 3:
the main structure of this embodiment is the same as that of embodiment 2, and further, the steel-concrete composite cover beam shell includes a steel web 11, and a steel top plate 1, a steel end plate 2, a steel inclined bottom plate 3 and a steel flat bottom plate 4 which are rectangular plates.
Referring to fig. 1, the steel top plate 1 and the steel bottom plate 4 are both horizontally arranged, the steel top plate 1 is located right above the steel bottom plate 4, and the steel bottom plate 4 is provided with an opening 13 and a plurality of round holes 12 which penetrate through the upper plate surface and the lower plate surface of the steel bottom plate.
The both ends of steel flat bottom plate 4 weld with two oblique bottom plates of steel 3 respectively, and the upper end welding of every oblique bottom plate of steel 3 has vertical steel end plate 2, and the both ends that weld steel roof 1 respectively of the upper end of two steel end plates 2 form inside cavity and both sides open-ended frame, and two vertical steel web 11 are the closing cap respectively and weld on the both sides opening of this frame.
Example 4:
the main structure of this embodiment is the same as embodiment 3, and further, see fig. 1, the lower surface welding of steel roof 1 has vertical trompil steel sheet 7, is provided with a plurality of interlude holes that supply the perforation reinforcing bar to pass on the trompil steel sheet 7, and a plurality of perforation reinforcing bars pass the interlude hole, and a plurality of perforation reinforcing bars are pre-buried to form PBL shear connector in concrete 6 and can guarantee steel roof 1 and concrete 6 collaborative work.
Example 5:
the main structure of this embodiment is the same as that of embodiment 4, and further, referring to fig. 1 or 2, a plurality of uniformly arranged weld nail connecting pieces 8 are welded on the inner walls of the steel inclined bottom plate 3, the steel flat bottom plate 4 and the steel web 11, so that the steel inclined bottom plate 3, the steel flat bottom plate 4, the steel web 11 and the concrete 6 can work cooperatively.
Example 6:
the main structure of this embodiment is the same as that of embodiment 5, and further, the contact surface between the upper end surface of the reinforced concrete pier stud 5 and the steel flat bottom plate 4 is coated with epoxy mortar for sealing, so that slurry leakage at the joint of the reinforced concrete pier stud 5 and the steel flat bottom plate 4 when the concrete 6 is poured can be prevented.
Example 7:
the main structure of this embodiment is the same as that of embodiment 6, and further, a pouring opening for pouring concrete 6 is formed in the steel top plate 1, and the concrete 6 is filled into the preformed groove 10 and the steel-concrete combined cover beam shell through the pouring opening. The concrete 6 is micro-expansive concrete.
Example 8:
the main structure of this embodiment is the same as that of embodiment 7, and further, a circular steel plate is welded on the top of the longitudinal force-bearing main rib 9 to reinforce the anchoring effect of the longitudinal force-bearing main rib 9 in the concrete 6.
Claims (7)
1. The steel-concrete combined bent cap is characterized in that: comprises a steel-concrete combined cover beam shell arranged on the reinforced concrete pier stud (5);
the steel-concrete combined bent cap shell is formed by welding steel plates, and the lower end face of the steel-concrete combined bent cap shell is provided with an opening (13) and a plurality of round holes (12) which penetrate through the inner side and the outer side of the steel-concrete combined bent cap shell;
the upper end face of the reinforced concrete pier stud (5) is provided with a reserved groove (10), and the size of the reserved groove (10) is matched with that of the opening (13);
a plurality of longitudinal stress main ribs (9) are arranged in the reinforced concrete pier stud (5), and the upper ends of the longitudinal stress main ribs (9) extend out of the upper end surface of the reinforced concrete pier stud (5) and the upper end opening of the reserved groove (10);
the steel-concrete combined capping beam shell is installed at the upper end of a reinforced concrete pier stud (5), the opening (13) is aligned with the reserved groove (10), the upper ends of the longitudinal stress main reinforcements (9) penetrate through the round hole (12) and the opening (13) and extend into the steel-concrete combined capping beam shell, and concrete (6) is filled in the reserved groove (10) and the steel-concrete combined capping beam shell.
2. A steel-concrete composite capping beam according to claim 1, wherein: the steel-concrete combined cover beam shell comprises a steel web plate (11), a steel top plate (1), a steel end plate (2), a steel inclined bottom plate (3) and a steel flat bottom plate (4), wherein the steel top plate, the steel end plate, the steel inclined bottom plate and the steel flat bottom plate are rectangular plates;
the steel top plate (1) and the steel flat bottom plate (4) are both horizontally arranged, the steel top plate (1) is positioned right above the steel flat bottom plate (4), and the steel flat bottom plate (4) is provided with a hole (13) and a plurality of round holes (12) which penetrate through the upper plate surface and the lower plate surface of the steel flat bottom plate;
the two ends of the steel flat bottom plate (4) are welded with the two steel inclined bottom plates (3) respectively, the upper end of each steel inclined bottom plate (3) is welded with a vertical steel end plate (2), the upper ends of the two steel end plates (2) are welded to the two ends of the steel top plate (1) respectively to form a frame with an inner hollow part and two openings on two sides, and two vertical steel web plates (11) are respectively sealed and welded to openings on two sides of the frame.
3. A steel-concrete composite capping beam according to claim 1, wherein: the lower surface welding of steel roof (1) has vertical trompil steel sheet (7), is provided with a plurality of interlude holes that supply the perforation reinforcing bar to pass on trompil steel sheet (7), and a plurality of perforation reinforcing bars pass the interlude hole.
4. A steel-concrete composite capping beam according to claim 2, wherein: a plurality of uniformly arranged welding nail connecting pieces (8) are welded on the inner walls of the steel inclined bottom plate (3), the steel flat bottom plate (4) and the steel web plate (11).
5. A steel-concrete composite capping beam according to claim 2, wherein: and epoxy mortar is coated on the contact surface of the upper end surface of the reinforced concrete pier stud (5) and the steel flat bottom plate (4) for sealing.
6. A steel-concrete composite capping beam according to claim 2, wherein: a pouring opening for pouring concrete (6) is formed in the steel top plate (1), and the concrete (6) is filled into the reserved groove (10) and the steel-concrete combined cover beam shell through the pouring opening; the concrete (6) is micro-expansive concrete.
7. A steel-concrete composite capping beam according to claim 1, wherein: and a circular steel plate is welded at the top of the longitudinal stress main rib (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011140137.9A CN112359711A (en) | 2020-10-22 | 2020-10-22 | Steel-concrete combined bent cap |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011140137.9A CN112359711A (en) | 2020-10-22 | 2020-10-22 | Steel-concrete combined bent cap |
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| CN112359711A true CN112359711A (en) | 2021-02-12 |
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| CN202011140137.9A Pending CN112359711A (en) | 2020-10-22 | 2020-10-22 | Steel-concrete combined bent cap |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004263501A (en) * | 2003-03-04 | 2004-09-24 | Sumitomo Mitsui Construction Co Ltd | Beam-column joint structural body |
| CN103452039A (en) * | 2013-09-13 | 2013-12-18 | 上海市城市建设设计研究总院 | Cast-in-situ inverted-T-shaped bent cap and pier and pier construction process |
| CN105803916A (en) * | 2016-03-30 | 2016-07-27 | 邵旭东 | Steel and ultra-high performance concrete light combined box type cover beam and manufacturing method thereof |
| CN110004821A (en) * | 2019-05-23 | 2019-07-12 | 福州大学 | A kind of precast pier connection structure and its construction method |
| CN110258302A (en) * | 2019-07-31 | 2019-09-20 | 福州大学 | Half prefabricated U HPC shell of one kind overlapping bent cap and Precast Pier Columns connecting structure and its construction method |
| CN111172864A (en) * | 2020-02-20 | 2020-05-19 | 浙江省交通规划设计研究院有限公司 | Assembly type integrated pier column and capping beam combined structure and construction method thereof |
-
2020
- 2020-10-22 CN CN202011140137.9A patent/CN112359711A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004263501A (en) * | 2003-03-04 | 2004-09-24 | Sumitomo Mitsui Construction Co Ltd | Beam-column joint structural body |
| CN103452039A (en) * | 2013-09-13 | 2013-12-18 | 上海市城市建设设计研究总院 | Cast-in-situ inverted-T-shaped bent cap and pier and pier construction process |
| CN105803916A (en) * | 2016-03-30 | 2016-07-27 | 邵旭东 | Steel and ultra-high performance concrete light combined box type cover beam and manufacturing method thereof |
| CN110004821A (en) * | 2019-05-23 | 2019-07-12 | 福州大学 | A kind of precast pier connection structure and its construction method |
| CN110258302A (en) * | 2019-07-31 | 2019-09-20 | 福州大学 | Half prefabricated U HPC shell of one kind overlapping bent cap and Precast Pier Columns connecting structure and its construction method |
| CN111172864A (en) * | 2020-02-20 | 2020-05-19 | 浙江省交通规划设计研究院有限公司 | Assembly type integrated pier column and capping beam combined structure and construction method thereof |
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Application publication date: 20210212 |